Puller for pump liners and valve seats



Jan. 12 ,1926. 1,569,614

' W. H. CLARK FULLER FOR PUMP LINERS AND VALVE SEATS Filed August 27. 1924 gaa/vento@ l v 011/ Gimmy Patented Jan. l2, 1926.

Uli`E- STATES WILLIAM Il'. CLARK, 0F WHITTIER, CALIFORNIA.

:FULLER FOR PUMPYLINERS AND VALVE SEATS.

Application led August 27, 1924. Serial No. 734,422.

To all whom t may concern:

Be it known that I, WiLmAM H. CLARK, a citizen of the United States, residing at Whittier, in the county of Los Angeles and State of California, have invented a new and useful Puller for Pump Liners and Valve Seats, of which the following is a specification.

This invention relates to means forv pulling pump liners out of cylinders of pumps and also for pulling valve seats.

Mud pumps are employed in the drilling of oil wells for circulating mud through the well casings for the purpose of carrying away the detritus loosened by the drill steels and the pumps hold the pressure on the wells so that the drilling operation can be continued when there is considerable gas pressure in the wells.

Because of the character of the fluid on which the pump operates and the necessarily high pressures employed, the mud works'between the liner and the cylinder and solidies there, thus causing sticking of the liner in the cylinder. It follows that the liners of mud pumps and also of deep well pumps are particularly difficult to pull .from the pump cylinders and barrels when it becomes necessary to substitute new liners for the old ones due to wear occasioned by the pumping operation. Ordinarily, the pulling of the liners of mud pumps requires several hours, thus entailing considerable labor, expense and loss of the use of the pump during that time.

An object of this' invention is to quickly effect the pulling of pump liners and valve seats when it becomes necessary to substitute new ones therefor.

Another object is to elfect the pulling of the liners and valve seats by engaging the inner ends thereof, the ei'ect being to push the liners out of the cylinders.

To eect the foregoing, there is provided a means insertable through the liner or valve seat and expansible to engage the inner end of said liner or valve seat, and means to exert a pull on the insertable means.

The accompanying drawings illustrate the invention:

Figure 1 is a longitudinal section of a typical mud pump, sho-wing two pullers embodying the invention in operative position on the pump, one puller being in position for pulling the liner and the other being il! position for pulling the valve seat.

Fig. 2 is a fragmental elevation, partly in section, from the line indicated by 2 2. rig. i.

I Tig. 3 is an end Viewr of the expansible u nit or collapsible jawsview being taken looking ing end of the jaws.

A fragment of a mud pump is shown in Fig. l, there being a cylinder 4, a liner 5 in said cylinder, packing 6 between the cylinder and theliner, and stud bolts 7 for holding the cylinder head, not shown, secured in place on the cylinder. Also the mud pump is provided with the customary valve seats 8.

Expansible means of suitable rconstruction, indicated in general by the character 9, lare inserted through the' liner or valve seat, as the case may be, to engage the liner when said means are expanded. In this particular instance the expansible means project beyond the inner ends of the liner or valve seat and comprise a unit made up of a number of collapsible jaws 10 connected with a feed screw 11 which passes'through a hole 1 2 in a support 13 and projects beyond said support. The projecting end of the screw 11 has thereon a nut 14 which engages screw threads 15 of the screw and the support 13 functions as an abutment toresist pressure of the nut 14 when said nut is turned to force the screw 11 outwardly.

Each of the jaws 10 has a threaded portion 16 engaging screw threads 17 of the screw 11. In this particular instance there are four jaws 10 and, when they are assembled, the threaded portions 16 together substantially form a circle at the ends of the jaws where the screw 11 enters, and the jaws are reduced outwardly so that when the screw 1l is backed out of the jaws the free ends of the jaws can readily collapse toward one another so as to reduce the diameter of the jaw unit at the free ends thereof, as when it is desired to pass the jaws through the liner or valve seat. The screw .11 constitutes one form of means for wedging the jaws outwardly to the expanded positions. Itis desirable to provide grooves 18 in the jaws 10 close to the inner ends of said jaws, the inner ends being those where the screw 11 enters the jaw unit. In the grooves 18 is seated a circular spring 19 which holds the jaws in engagement with the screw threads 17 and also collapses the jaws when the screw ,ll is backed out until the screw .barely engages .said jaws.

at the liner-engagof the puller, the

The free ends of the jaws l are provided on their outer faces with shoulders :Q0 which are adapted to engage the inner end of the liner 5 or Valve seat 8, as the case may be, to effect removal thereof.

To pull the valve seat 8 the screw 1l will be backed out olf the jaws until only `the very tip of the threaded portion engages said jaws. When this is done the spring;` llwill cause the jaws l0 to collapse and hold them in such-condition. rlllien the jaws will be inserted in the valve seat 8 sutlciently tar to bring' the shoulders Q0 beyond the inner end ot' the ifa/lire seat, whereupon the screw lil will be turned to expand fthe jaw unit, thus bringnjfinc` the shoulder 2() in alinenient with the inner end of the valve seat. Then the nut 'l-l will be turned to torce `the unit outwardly, thus engaginl the shoulders 2O withltlie valve seat and lorcingsaid seat out of the opening 2i which the valve seat normally engages.

lllhen the puller is employed to pull the liner 5, a ring 22 Awill be placed over the stud bolts in place of the cylinder head, not shown, and sai-d ringis provided with anumber of outstanding 4spacers 23 which are secured attheir outer ends by nuts or other suitable means to the support 13. These spacers 23 are necessary when pulling` the linerin order to hold the support 155 a suihcient distance from the cylinder to accommodate the liner between the cylinder and the supportl when `itis pulled outiot said cylinder. The actual operation of pulling the liner is the same as described abovev for pulling the valve seat and, therefore, .a

further description of the operation, is unnecessary.

I claim:

l. A puller of the character described comprising` an -expansible unit formed from a number of separate jaws, said jaws hav- -ingthre'aded portions substantially forming;- a circle at one `end of the expansible unit, the jaws being reduce-d toward the other end of the unit, a screw engaging the screw threads, a support, a nut on the screw engaging the support, the smaller `ends oi the jaws haring` shoulders to engage the member that is to be pulled,` and means to hold the jaws assembled on the screw.

2. A puller of the character described comprising an expansible unit formed from a number of separate jaws, sai-d aws haring threaded portions substantially forming a circle at one end of the expansible unit, -the jaws being reduced toward the other end of theaunit to permit collapsing thereof, a screw engaging the screw threads, a support, a nutren the screw engagingthe support, the smaller ends of the jaws having shoulders to engage the member that is to be pulled, there beinggrooves inthe outer faces oit' the jaws near iithe larger `ends of said jaws, anda circular spring` seated in the grooves and operating` to collapse the jaws when the screw is backed out so as to engage Vonlythe `portion `of the jaws between the grooves and the larger iendo'f thearws.

Signed at Los Angeles, California, this 520th day` 0i' August, 11924. l

i wiLLraM ri. CLARK. 

